Is it wrong to suggest someone who has made a number of outlandish claims in recent years and is quite elderly is suffering from a degraded mental state, as we

Is it wrong to suggest someone who has made a number of outlandish claims in recent years and is quite elderly is suffering from a degraded mental state, as we all know is wont to happen to the elderly? That's not actually the thing you are getting all this flak for - we don't have to decide or agree if it's 'wrong' on some broad scale or whether or not it constitutes a logical fallacy. It's corrosive to the notion of a (however imperfect and irritating) internet forum that aims for interestingness and curious conversation. Which is why it's in the written guidelines, the reams of mod comments, the mod-scolding you got earlier. Globally wrong or not, you can't do it on HN because it would kill HN.